Sewage low-carbon biological treatment system self-adaptive to water quality change and method thereof

Abstract

The invention discloses a sewage low-carbon biological treatment system and method self-adaptive to water quality change. The sewage low-carbon biological treatment system comprises a sludge concentration fermentation tank, a rectangular water inlet box culvert, a multifunctional tank, a biological reaction tank, an external reflux sludge channel, a secondary sedimentation tank and an effluent quality online monitoring system, the two sides of the rectangular water inlet box culvert are each connected with one multifunctional pool, and the two sets of multifunctional pools are rectangular. A sludge concentration fermentation tank is arranged on one side of the multifunctional tank, the other side of the multifunctional tank is connected with the biological reaction tank, an overrunning box culvert is arranged between the multifunctional tank and the biological reaction tank, and the water inlet end of the overrunning box culvert is connected with a water outlet port of a rectangular water inlet box culvert; the water outlet end of the biological reaction tank is connected with the secondary sedimentation tank; an outer return sludge channel is arranged on one side of the water distribution channel of the secondary sedimentation tank and extends to surround the peripheries of the biological reaction tank, the multifunctional tank and the sludge concentration and fermentation tank. The invention solves the technical problem that the matrix metabolism balance of the biological treatment system is difficult to realize when the water quality is unstable.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage low-carbon biological treatment system and a method for self-adapting water quality changes. Background technique [0002] As we all know, the sewage biological treatment system has both nitrogen and phosphorus removal functional microorganisms and many non-functional microorganisms; the latter consumes carbon sources but does not participate in the removal of nitrogen and phosphorus, resulting in the production of a large amount of carbon dioxide and sludge and the reduction of phosphorus and nitrogen removal efficiency. Functional microorganisms can obtain energy (ATP) by decomposing intracellular phosphorus polyphosphate under anaerobic conditions, absorbing sewage-available carbon substrates (such as acetic acid) into cells and synthesizing them into polyhydroxyalkanoic acids (PHA, mainly including hydroxybutyric acid) (PHB) and polyhydroxyvaleri...

AI Technical Summary

Problems solved by technology

However, at present, by setting regulating tanks in sewage plants, it is possible to achieve peak-shaving and valley-filling of influent water, but its water quality load will still fluctuate greatly, and biological reactions rely on microorganisms to degrade organic load pollutants, and it is difficult for microbial systems to adapt to water quality. large fluctuations

The ensuing problem is that the influent carbon source is insufficient, and denitrification denitrification and anaerobic phosphorus release compete with each other for carbon sources, resulting in unstable nitrogen and phosphorus content in the effluent.

At the cost of excessive consumption of sewage carbon resources, non-functional microorganisms also produce a large amount of greenhouse gases such as carbon dioxide, nitrous oxide, and methane; danger of secondary pollution

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